<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		#content-id{color:red;}
		.content-class{color:yellow;}
		div{color:green !important;}
	</style>
</head>
<body>
	<div class="content-class" id="content-id">
	猜猜我什么颜色，红色？黄色？ 绿色？
	</div>
</body>
</html>
